Jointer guard



Jan. 29, 1929.

1,700,206 w. H. MORRIS ET AL JOINTER GUARD Filed Nov. 9, 1927 an umlfou Mil-Marri s. W; C'- rackaf'v Patented Jan. 29, 1929.

UNITED STATES PATENT OFFICE.

WADE HAMPTON MORRIS, OF HAMPTON, AND WILLIAM COKE TUCKER, OF NEWPORT NEWS, VIRGINIA.

J'OINTER GUARD.

Application filed November 9, 1927.

The rotary cutters of jointing machines are generally unprotected, hence the Workman is exposed to injury and required to be cautious to, avoid a casualty. This necessarily detracts from the output of the operator, hence the desirability of providing a guard for the protection of the workman who is thereby enabled to perform a greater amount of work in a given time because he is not required to exercise the same caution made necessary in the operation of jointers in which the cutters are exposed and which cautious care consumes time.

While the drawing illustrates a preferred '1 embodiment of the invention, it is to be underhereto attached, in which,

Figure 1 is a front view of a jointing machine provided with a guard embodying the invention.

Figure 2 is a top plan view of the machine and guard.

Figure 3 is an enlarged sectional view of the guard on the line 33 of Figure 2.

Figure 4 is a view similar to Figure 1, showing a modification.

Corresponding and like parts are referred to in the following description and designated in the several views of the drawing by like reference characters.

The jointing machine illustrated is of conventional type and is shown to demonstrate the application of the invention, and comprises a body or frame 1, a base or stand 2, a

table 3, guide 4, and rotary cutter 5.

The guard consists of a metal disk 6 of concavo-oonvex form, and arranged with the concave side adjacent and facing the table 3. The peripheral or marginal edge portion of the disk 6 is curved upwardly, as indicated at 7, to provide a reinforcement as well as convenient means for attaching a protective element 8 to the outer edge portion of the disk. The protective element 8 is of annular form and consists of fibrous material, such as ply wood. The protective element 8 prevents direct contact of the blades of the rotary cutter with the Serial No. 232,100.

guard, and in the event of the element having its efliciency impaired by coming in contact with the rotary cutter 5, it may be readily replaced. The sheet metal disk 6 is light and thin and strengthened by reason of its concavo-convex form. The protective element 8 may be glued or otherwise secured to the guard to admit of readyreplacement. The guard is of a diameter to extend over the rotary cutter 5 and afford ample protection to the workman.

An arm 9 is disposed to extend over the table of the jointer and the guard is pivoted to the swinging end thereof in any determinate way. The axis 10 is shown as consisting of a bolt, and a ball bearing 11 is interposed between the axis 10 and the guard to reduce the friction to the smallest amount possible. An upright 12 supports the arm 9 and may form a part thereof. The upright 12 is pivotally supported to admitof the arm 9 swinging as the guard 6 moves over the table of the jointing machine. As indicated in Figures 1 and 2 a standard 13 is secured to the floor adjacent the jointing machine, and receives the upright 12. A collar 14 is secured to the upright 12 and engages the top of the standard 13 to support the guard so as to clear the top of the table 3. A short arm 15 projects laterally from the collar 14 and one end of a cord 16 is attached thereto, a weight 17 being applied to the opposite end of the cord. The cord 16 passes over a guide pulley 18 attached to the jointing machine. The weight 17 is of suificient mass to maintain the guard 6 over the table of the jointing machine so as to cover the rotary cutter 5 When the work is placed upon the table 3 in a manner well understood, the guard 6 is adjusted so as to engage the outer edge of the work, the latter being disposed between the guard and the guide 4, and as the work is advanced the guard rotates, thereby oifering a minimum resistance to the movement of the work, as will be readily appreciated.

In the modification shown in Figure 4 a bracket 13 is secured to the frame of the jointing machine, and receives the lower portion of the upright 12 which is journaled therein. A collar 12 is secured to the upright 12 and engages and rests upon the top of the bracket 13 to support the guard in proper position. The upright is offset, as indicated at 19, and the weighted cord 16 is connected thereto, the ofi'set 19 performing the same function as the arm 15 of the collar 12.

The protective element 8 presents an edge of sufficient depthto engage the work, and also prevent injury to the knives of the rotary cutter 5 should they come in contact with the guard from any cause.

Having thus described the invention, we claim:

1. A jointer guard consisting of a sheet metal disk having its peripheral portion upwardly curved and having a protective element of fibrous material applied to the hol- 10w sides of the upwardly curved peripheral portion.

2. A jointer guard consisting of a sheet metal disk of concavo-convex form, and having its peripheral portion upwardly curved, and an annular protective element of fibrous material applied to the hollow side of the upwardly curved peripheral edge.

In testimony whereof we aflix our signatures.

WADE H, MORRIS [L. s] WILLIAM C. TUCKER. [1 s] 

